WAEC Mathematics 2025 Objective — Question 50
Question 50 of 51 from the West African Examinations Council (WAEC) Mathematics 2025 Objective paper, with the correct answer and a full explanation.
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If (x+2) is a factor of x^2 + Px - 10, find the value of P.
- A. 3
- B. -3Correct
- C. 7
- D. -7
Explanation
By the factor theorem, if (x+2) is a factor, then x=-2 makes the expression zero: (-2)^2+P(-2)-10=0 => 4-2P-10=0 => -2P=6 => P=-3.
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